package com.example.apigateway.filters;

import com.example.apigateway.config.IgnoreUrlsConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;
import org.springframework.util.PathMatcher;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.WebFilterChain;
import reactor.core.publisher.Mono;

import java.net.URI;
import java.util.List;

/** 白名单路径访问时需要移除JWT请求头 @Author: yang @Date: 2021/8/22 0022 14:54 @Version 0.0.1 */
@Component
public class IgnoreUrlsRemoveJwtFilter implements WebFilter {
  @Autowired private IgnoreUrlsConfig ignoreUrlsConfig;

  @Override
  public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
    ServerHttpRequest request = exchange.getRequest();
    URI uri = request.getURI();
    PathMatcher pathMatcher = new AntPathMatcher();
    // 白名单路径移除JWT请求头
    List<String> ignoreUrls = ignoreUrlsConfig.getWhiteUrls();
    for (String ignoreUrl : ignoreUrls) {
      if (pathMatcher.match(ignoreUrl, uri.getPath())) {
        request = exchange.getRequest().mutate().header("Authorization", "").build();
        exchange = exchange.mutate().request(request).build();
        return chain.filter(exchange);
      }
    }
    return chain.filter(exchange);
  }
}
